<template>
  <div class="app-container">
    <!--查询表单-->
  <el-card class="operate-container" shadow="never">
    <el-form :inline="true" class="demo-form-inline">
    <el-form-item label="名称">
      <el-input v-model="searchObj.name" placeholder="讲师名" /> 
    </el-form-item>

    <el-form-item label="头衔">
      <el-select v-model="searchObj.level" clearable placeholder="头衔">
        <el-option value="1" label="高级讲师"/>
        <el-option value="0" label="首席讲师"/>
      </el-select>
    </el-form-item>

    <el-form-item label="入驻时间">
      <el-date-picker
        v-model="searchObj.joinDateBegin"
        placeholder="开始时间"
        value-format="yyyy-MM-dd" />
    </el-form-item>
    <el-form-item label="-">
      <el-date-picker
        v-model="searchObj.joinDateEnd"
        placeholder="结束时间"
        value-format="yyyy-MM-dd" />
    </el-form-item>

      <el-button type="primary" icon="el-icon-search" @click="fetchData()">查询</el-button>
      <el-button type="default" @click="resetData()">清空</el-button>
  </el-form>
  </el-card>
  <!-- 工具按钮 -->
  <el-card class="operate-container" shadow="never">
    <i class="el-icon-tickets" style="margin-top: 5px"></i>
    <span style="margin-top: 5px">数据列表</span>
    <el-button class="btn-add" @click="add()" style="margin-left: 10px;">添加</el-button>
    <el-button class="btn-add" @click="batchRemove()" >批量删除</el-button>
  </el-card>
  <!-- 表格 -->
  <el-table
    :data="list"
    border
    stripe
    @selection-change="handleSelectionChange">
    <el-table-column type="selection"/>
    <el-table-column
      label="序号"
      width="50">
      <template slot-scope="scope">
        {{ (page - 1) * limit + scope.$index + 1 }}
      </template>
    </el-table-column>
    <el-table-column prop="name" label="名称" width="80" />
    <el-table-column label="头衔" width="90">
      <template slot-scope="scope">
        <el-tag v-if="scope.row.level === 1" type="success" size="mini">高级讲师</el-tag>
        <el-tag v-if="scope.row.level === 0" size="mini">首席讲师</el-tag>
      </template>
    </el-table-column>
    <el-table-column prop="intro" label="简介" />
    <el-table-column prop="sort" label="排序" width="60" />
    <el-table-column prop="joinDate" label="入驻时间" width="160" />
    <el-table-column label="操作" width="200" align="center">
      <template slot-scope="scope">
        <router-link :to="'/vod/teacher/edit/'+scope.row.id">
          <el-button type="primary" size="mini">修改</el-button>
        </router-link>
        <el-button class="del" type="danger" size="mini" @click="removeById(scope.row.id)">删除</el-button>
      </template>
    </el-table-column>
  </el-table>
   <!-- 分页组件 -->
    <el-pagination
      :current-page="page"
      :total="total"
      :page-size="limit"
      :page-sizes="[5, 10, 20, 30, 40, 50, 100]"
      style="padding: 30px 0; text-align: center;"
      layout="total, sizes, prev, pager, next, jumper"
      @size-change="changePageSize"
      @current-change="changeCurrentPage"
    />
  </div>
  

</template>

<script>
// 引入接口js文件
import  teacherApi from "@/api/vod/index"
export default {
    name:"list",
    data(){
      return {
        list: [], // 讲师列表
        total: 0, // 总记录数
        page: 1, // 页码
        limit: 10, // 每页记录数
        searchObj: {}, // 查询条件
        multipleSelection: []// 批量删除选中的记录列表
      }
    },
    created(){
      this.fetchData()
    },
    methods:{
      add(){
        this.$router.push({name:"teacherCreate"})
      },
      // 分页查询讲师列表
      fetchData() {
        teacherApi.pageList(this.page,this.limit,this.searchObj)
        .then(response => {
           this.list = response.data.records;
           this.total = response.data.total;
        }).catch(error => {
          console.log(error);
        })
      },
      // 改变每页的记录数量
      changePageSize(size){
        this.limit = size;
        this.fetchData()
      },
      // 改变每一页的页数
      changeCurrentPage(page){
        this.page = page;
        this.fetchData();
      },
      // 清空
      resetData(){
        this.searchObj = {};
        this.fetchData();
      },
      // 根据id逻辑删除讲师
      removeById(id){
         this.$confirm('此操作将永久删除该讲师, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          teacherApi.deleteVodById(id)
          .then(res => {
            if(res.code==20000){
              this.$message({
                type: 'success',
                message: '删除成功!'
              });
              this.fetchData();
            }else{
                this.$message({
                  type: 'info',
                  message: res.message
                }); 
            }
          })
        }).catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          });          
        });
      },
      // 批量删除
      batchRemove() {
        if (this.multipleSelection.length === 0) {
          this.$message.warning('请选择要删除的记录！')
          return
        }
        this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          // 点击确定，远程调用ajax
          // 遍历selection，将id取出放入id列表
          var idList = []
          this.multipleSelection.forEach(item => {
            idList.push(item.id)
          })
          // 调用api
          return teacherApi.batchRemove(idList)
        }).then((response) => {
          this.fetchData()
          this.$message.success(response.message)
        }).catch(error => {
          if (error === 'cancel') {
            this.$message.info('取消删除')
          }
        })
      },
      // 当多选选项发生变化的时候调用
      handleSelectionChange(selection) {
        this.multipleSelection = selection
      },
    }
}
</script>

<style>
  .del{
    margin-left: 10px;
  }
</style>